I've been looking for an alternative to Loom and Komodo, but this just ain't it. It slows your computer down to a crawl (except my PC, but Macs--fugetaboutit, too slow). No only that, if your testing out responsive screen sizes, and frequently have to resize windows during videos, this'll drive you mad. The screen distorts and bugs out when resizing. Doing a return, unfortunately. I'm glad it worked out for others.